The Osage Nation Congress shall convene twice annually in regular session, so that six (6) months shall not intervene between the last sitting of the Congress and its first sitting in the next session. Regular sessions shall convene on such day and at such time as the Osage Nation Congress shall determine by law.

The first regular congressional session of each year shall be titled the (Hun-kah) Session and the second regular congressional session of the year shall be titled the (Tzi-zho) Session. This schedule shall be in honor of the ancient moiety division of Earth and Sky and serves to remind all Osages of the responsibility to bring balance and harmony to the Nation.

At the written request of two-thirds (2/3) of the members, the Speaker shall convene the Osage Nation Congress in special session. The Principal Chief may convene the Osage Nation Congress in special session.

Regular sessions shall be limited to a period of twenty-four (24) days, and special sessions shall be limited to a period of ten (10) days. Any session may be extended a total of not more than three (3) days. Such extension shall be granted by the Speaker at the written request of two-thirds (2/3) of the members or may be granted by the Principal Chief.

The Osage Nation Congress shall not adjourn during any session of the legislature for more than three (3) days, Sundays excepted, or to any other place.

The Osage Nation Congress may only meet in the interim, the period of time between two sessions, by Interim Committee(s) to study a particular subject or subjects in order to make recommendations to the next regular session of the legislature.